mount_nfs.c revision 1.6
1 /* 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1992, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 /*static char sccsid[] = "from: @(#)mount_nfs.c 8.3 (Berkeley) 3/27/94";*/ 45 static char *rcsid = "$Id: mount_nfs.c,v 1.6 1994/09/23 14:27:30 mycroft Exp $"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/mount.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/stat.h> 53 #include <sys/syslog.h> 54 55 #include <rpc/rpc.h> 56 #include <rpc/pmap_clnt.h> 57 #include <rpc/pmap_prot.h> 58 59 #ifdef ISO 60 #include <netiso/iso.h> 61 #endif 62 63 #ifdef KERBEROS 64 #include <kerberosIV/des.h> 65 #include <kerberosIV/krb.h> 66 #endif 67 68 #include <nfs/rpcv2.h> 69 #include <nfs/nfsv2.h> 70 #define KERNEL 71 #include <nfs/nfs.h> 72 #undef KERNEL 73 #include <nfs/nqnfs.h> 74 75 #include <arpa/inet.h> 76 77 #include <ctype.h> 78 #include <err.h> 79 #include <errno.h> 80 #include <fcntl.h> 81 #include <netdb.h> 82 #include <signal.h> 83 #include <stdio.h> 84 #include <stdlib.h> 85 #include <strings.h> 86 #include <unistd.h> 87 88 #include "mntopts.h" 89 90 struct mntopt mopts[] = { 91 MOPT_STDOPTS, 92 MOPT_FORCE, 93 MOPT_UPDATE, 94 { NULL } 95 }; 96 97 struct nfs_args nfsdefargs = { 98 (struct sockaddr *)0, 99 sizeof (struct sockaddr_in), 100 SOCK_DGRAM, 101 0, 102 (nfsv2fh_t *)0, 103 0, 104 NFS_WSIZE, 105 NFS_RSIZE, 106 NFS_TIMEO, 107 NFS_RETRANS, 108 NFS_MAXGRPS, 109 NFS_DEFRAHEAD, 110 NQ_DEFLEASE, 111 NQ_DEADTHRESH, 112 (char *)0, 113 }; 114 115 struct nfhret { 116 u_long stat; 117 nfsv2fh_t nfh; 118 }; 119 #define DEF_RETRY 10000 120 #define BGRND 1 121 #define ISBGRND 2 122 int retrycnt = DEF_RETRY; 123 int opflags = 0; 124 125 #ifdef KERBEROS 126 char inst[INST_SZ]; 127 char realm[REALM_SZ]; 128 KTEXT_ST kt; 129 #endif 130 131 int getnfsargs __P((char *, struct nfs_args *)); 132 #ifdef ISO 133 struct iso_addr *iso_addr __P((const char *)); 134 #endif 135 void set_rpc_maxgrouplist __P((int)); 136 __dead void usage __P((void)); 137 int xdr_dir __P((XDR *, char *)); 138 int xdr_fh __P((XDR *, struct nfhret *)); 139 140 int 141 main(argc, argv) 142 int argc; 143 char *argv[]; 144 { 145 register int c; 146 register struct nfs_args *nfsargsp; 147 struct nfs_args nfsargs; 148 struct nfsd_cargs ncd; 149 int mntflags, i, nfssvc_flag, num; 150 char *name, *p, *spec; 151 int error = 0; 152 #ifdef KERBEROS 153 uid_t last_ruid; 154 #endif 155 156 #ifdef KERBEROS 157 last_ruid = -1; 158 if (krb_get_lrealm(realm, 0) != KSUCCESS) 159 (void)strcpy(realm, KRB_REALM); 160 #endif 161 retrycnt = DEF_RETRY; 162 163 mntflags = 0; 164 nfsargs = nfsdefargs; 165 nfsargsp = &nfsargs; 166 while ((c = getopt(argc, argv, 167 "a:bcdD:g:iKklL:Mm:o:PpqR:r:sTt:w:x:")) != EOF) 168 switch (c) { 169 case 'a': 170 num = strtol(optarg, &p, 10); 171 if (*p || num < 0) 172 errx(1, "illegal -a value -- %s", optarg); 173 nfsargsp->readahead = num; 174 nfsargsp->flags |= NFSMNT_READAHEAD; 175 break; 176 case 'b': 177 opflags |= BGRND; 178 break; 179 case 'c': 180 nfsargsp->flags |= NFSMNT_NOCONN; 181 break; 182 case 'D': 183 num = strtol(optarg, &p, 10); 184 if (*p || num <= 0) 185 errx(1, "illegal -D value -- %s", optarg); 186 nfsargsp->deadthresh = num; 187 nfsargsp->flags |= NFSMNT_DEADTHRESH; 188 break; 189 case 'd': 190 nfsargsp->flags |= NFSMNT_DUMBTIMR; 191 break; 192 #if 0 /* XXXX */ 193 case 'g': 194 num = strtol(optarg, &p, 10); 195 if (*p || num <= 0) 196 errx(1, "illegal -g value -- %s", optarg); 197 set_rpc_maxgrouplist(num); 198 nfsargsp->maxgrouplist = num; 199 nfsargsp->flags |= NFSMNT_MAXGRPS; 200 break; 201 #endif 202 case 'i': 203 nfsargsp->flags |= NFSMNT_INT; 204 break; 205 #ifdef KERBEROS 206 case 'K': 207 nfsargsp->flags |= NFSMNT_KERB; 208 break; 209 #endif 210 case 'k': 211 nfsargsp->flags |= NFSMNT_NQLOOKLEASE; 212 break; 213 case 'L': 214 num = strtol(optarg, &p, 10); 215 if (*p || num < 2) 216 errx(1, "illegal -L value -- %s", optarg); 217 nfsargsp->leaseterm = num; 218 nfsargsp->flags |= NFSMNT_LEASETERM; 219 break; 220 case 'l': 221 nfsargsp->flags |= NFSMNT_RDIRALOOK; 222 break; 223 case 'M': 224 nfsargsp->flags |= NFSMNT_MYWRITE; 225 break; 226 #ifdef KERBEROS 227 case 'm': 228 (void)strncpy(realm, optarg, REALM_SZ - 1); 229 realm[REALM_SZ - 1] = '\0'; 230 break; 231 #endif 232 case 'o': 233 getmntopts(optarg, mopts, &mntflags); 234 break; 235 case 'P': 236 nfsargsp->flags |= NFSMNT_RESVPORT; 237 break; 238 #ifdef ISO 239 case 'p': 240 nfsargsp->sotype = SOCK_SEQPACKET; 241 break; 242 #endif 243 case 'q': 244 nfsargsp->flags |= NFSMNT_NQNFS; 245 break; 246 case 'R': 247 num = strtol(optarg, &p, 10); 248 if (*p || num <= 0) 249 errx(1, "illegal -R value -- %s", optarg); 250 retrycnt = num; 251 break; 252 case 'r': 253 num = strtol(optarg, &p, 10); 254 if (*p || num <= 0) 255 errx(1, "illegal -r value -- %s", optarg); 256 nfsargsp->rsize = num; 257 nfsargsp->flags |= NFSMNT_RSIZE; 258 break; 259 case 's': 260 nfsargsp->flags |= NFSMNT_SOFT; 261 break; 262 case 'T': 263 nfsargsp->sotype = SOCK_STREAM; 264 break; 265 case 't': 266 num = strtol(optarg, &p, 10); 267 if (*p || num <= 0) 268 errx(1, "illegal -t value -- %s", optarg); 269 nfsargsp->timeo = num; 270 nfsargsp->flags |= NFSMNT_TIMEO; 271 break; 272 case 'w': 273 num = strtol(optarg, &p, 10); 274 if (*p || num <= 0) 275 errx(1, "illegal -w value -- %s", optarg); 276 nfsargsp->wsize = num; 277 nfsargsp->flags |= NFSMNT_WSIZE; 278 break; 279 case 'x': 280 num = strtol(optarg, &p, 10); 281 if (*p || num <= 0) 282 errx(1, "illegal -x value -- %s", optarg); 283 nfsargsp->retrans = num; 284 nfsargsp->flags |= NFSMNT_RETRANS; 285 break; 286 default: 287 usage(); 288 break; 289 } 290 argc -= optind; 291 argv += optind; 292 293 if (argc != 2) 294 error = 1; 295 296 spec = *argv++; 297 name = *argv; 298 299 if (!getnfsargs(spec, nfsargsp)) 300 exit(1); 301 if (mount(MOUNT_NFS, name, mntflags, nfsargsp)) 302 err(1, "%s", name); 303 if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) { 304 if ((opflags & ISBGRND) == 0) { 305 if (i = fork()) { 306 if (i == -1) 307 err(1, "nqnfs 1"); 308 exit(0); 309 } 310 (void) setsid(); 311 (void) close(STDIN_FILENO); 312 (void) close(STDOUT_FILENO); 313 (void) close(STDERR_FILENO); 314 (void) chdir("/"); 315 } 316 openlog("mount_nfs:", LOG_PID, LOG_DAEMON); 317 nfssvc_flag = NFSSVC_MNTD; 318 ncd.ncd_dirp = name; 319 while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) { 320 if (errno != ENEEDAUTH) { 321 syslog(LOG_ERR, "nfssvc err %m"); 322 continue; 323 } 324 nfssvc_flag = 325 NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL; 326 #ifdef KERBEROS 327 /* 328 * Set up as ncd_authuid for the kerberos call. 329 * Must set ruid to ncd_authuid and reset the 330 * ticket name iff ncd_authuid is not the same 331 * as last time, so that the right ticket file 332 * is found. 333 */ 334 if (ncd.ncd_authuid != last_ruid) { 335 krb_set_tkt_string(""); 336 last_ruid = ncd.ncd_authuid; 337 } 338 setreuid(ncd.ncd_authuid, 0); 339 if (krb_mk_req(&kt, "rcmd", inst, realm, 0) == 340 KSUCCESS && 341 kt.length <= (RPCAUTH_MAXSIZ - 2 * NFSX_UNSIGNED)) { 342 ncd.ncd_authtype = RPCAUTH_NQNFS; 343 ncd.ncd_authlen = kt.length; 344 ncd.ncd_authstr = (char *)kt.dat; 345 nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH; 346 } 347 setreuid(0, 0); 348 #endif /* KERBEROS */ 349 } 350 } 351 exit(0); 352 } 353 354 int 355 getnfsargs(spec, nfsargsp) 356 char *spec; 357 struct nfs_args *nfsargsp; 358 { 359 register CLIENT *clp; 360 struct hostent *hp; 361 static struct sockaddr_in saddr; 362 #ifdef ISO 363 static struct sockaddr_iso isoaddr; 364 struct iso_addr *isop; 365 int isoflag = 0; 366 #endif 367 struct timeval pertry, try; 368 enum clnt_stat clnt_stat; 369 int so = RPC_ANYSOCK, i; 370 char *hostp, *delimp; 371 #ifdef KERBEROS 372 char *cp; 373 #endif 374 u_short tport; 375 static struct nfhret nfhret; 376 static char nam[MNAMELEN + 1]; 377 378 strncpy(nam, spec, MNAMELEN); 379 nam[MNAMELEN] = '\0'; 380 if ((delimp = strchr(spec, '@')) != NULL) { 381 hostp = delimp + 1; 382 } else if ((delimp = strchr(spec, ':')) != NULL) { 383 hostp = spec; 384 spec = delimp + 1; 385 } else { 386 warnx("no <host>:<dirpath> or <dirpath>@<host> spec"); 387 return (0); 388 } 389 *delimp = '\0'; 390 /* 391 * DUMB!! Until the mount protocol works on iso transport, we must 392 * supply both an iso and an inet address for the host. 393 */ 394 #ifdef ISO 395 if (!strncmp(hostp, "iso=", 4)) { 396 u_short isoport; 397 398 hostp += 4; 399 isoflag++; 400 if ((delimp = strchr(hostp, '+')) == NULL) { 401 warnx("no iso+inet address"); 402 return (0); 403 } 404 *delimp = '\0'; 405 if ((isop = iso_addr(hostp)) == NULL) { 406 warnx("bad ISO address"); 407 return (0); 408 } 409 memset(&isoaddr, 0, sizeof (isoaddr)); 410 memcpy(&isoaddr.siso_addr, isop, sizeof (struct iso_addr)); 411 isoaddr.siso_len = sizeof (isoaddr); 412 isoaddr.siso_family = AF_ISO; 413 isoaddr.siso_tlen = 2; 414 isoport = htons(NFS_PORT); 415 memcpy(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen); 416 hostp = delimp + 1; 417 } 418 #endif /* ISO */ 419 420 /* 421 * Handle an internet host address and reverse resolve it if 422 * doing Kerberos. 423 */ 424 if (isdigit(*hostp)) { 425 if ((saddr.sin_addr.s_addr = inet_addr(hostp)) == -1) { 426 warnx("bad net address %s", hostp); 427 return (0); 428 } 429 if ((nfsargsp->flags & NFSMNT_KERB)) { 430 if ((hp = gethostbyaddr((char *)&saddr.sin_addr.s_addr, 431 sizeof (u_long), AF_INET)) == (struct hostent *)0) { 432 warnx("can't reverse resolve net address"); 433 return (0); 434 } 435 memcpy(&saddr.sin_addr, hp->h_addr, hp->h_length); 436 } 437 } else if ((hp = gethostbyname(hostp)) == NULL) { 438 warnx("can't get net id for host"); 439 return (0); 440 } else 441 memcpy(&saddr.sin_addr, hp->h_addr, hp->h_length); 442 #ifdef KERBEROS 443 if (nfsargsp->flags & NFSMNT_KERB) { 444 strncpy(inst, hp->h_name, INST_SZ); 445 inst[INST_SZ - 1] = '\0'; 446 if (cp = strchr(inst, '.')) 447 *cp = '\0'; 448 } 449 #endif /* KERBEROS */ 450 451 nfhret.stat = EACCES; /* Mark not yet successful */ 452 while (retrycnt > 0) { 453 saddr.sin_family = AF_INET; 454 saddr.sin_port = htons(PMAPPORT); 455 if ((tport = pmap_getport(&saddr, RPCPROG_NFS, 456 NFS_VER2, nfsargsp->sotype == SOCK_STREAM ? IPPROTO_TCP : 457 IPPROTO_UDP)) == 0) { 458 if ((opflags & ISBGRND) == 0) 459 clnt_pcreateerror("NFS Portmap"); 460 } else { 461 saddr.sin_port = 0; 462 pertry.tv_sec = 10; 463 pertry.tv_usec = 0; 464 if ((clp = (nfsargsp->sotype == SOCK_STREAM ? 465 clnttcp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 466 &so, 0, 0) : 467 clntudp_create(&saddr, RPCPROG_MNT, RPCMNT_VER1, 468 pertry, &so))) == NULL) { 469 if ((opflags & ISBGRND) == 0) 470 clnt_pcreateerror("Cannot MNT PRC"); 471 } else { 472 clp->cl_auth = authunix_create_default(); 473 try.tv_sec = 10; 474 try.tv_usec = 0; 475 clnt_stat = clnt_call(clp, RPCMNT_MOUNT, 476 xdr_dir, spec, xdr_fh, &nfhret, try); 477 if (clnt_stat != RPC_SUCCESS) { 478 if ((opflags & ISBGRND) == 0) 479 warnx("%s", clnt_sperror(clp, 480 "bad MNT RPC")); 481 } else { 482 auth_destroy(clp->cl_auth); 483 clnt_destroy(clp); 484 retrycnt = 0; 485 } 486 } 487 } 488 if (--retrycnt > 0) { 489 if (opflags & BGRND) { 490 opflags &= ~BGRND; 491 if (i = fork()) { 492 if (i == -1) 493 err(1, "nqnfs 2"); 494 exit(0); 495 } 496 (void) setsid(); 497 (void) close(STDIN_FILENO); 498 (void) close(STDOUT_FILENO); 499 (void) close(STDERR_FILENO); 500 (void) chdir("/"); 501 opflags |= ISBGRND; 502 } 503 sleep(60); 504 } 505 } 506 if (nfhret.stat) { 507 if (opflags & ISBGRND) 508 exit(1); 509 errno = nfhret.stat; 510 warn("can't access %s", spec); 511 return (0); 512 } 513 saddr.sin_port = htons(tport); 514 #ifdef ISO 515 if (isoflag) { 516 nfsargsp->addr = (struct sockaddr *) &isoaddr; 517 nfsargsp->addrlen = sizeof (isoaddr); 518 } else 519 #endif /* ISO */ 520 { 521 nfsargsp->addr = (struct sockaddr *) &saddr; 522 nfsargsp->addrlen = sizeof (saddr); 523 } 524 nfsargsp->fh = &nfhret.nfh; 525 nfsargsp->hostname = nam; 526 return (1); 527 } 528 529 /* 530 * xdr routines for mount rpc's 531 */ 532 int 533 xdr_dir(xdrsp, dirp) 534 XDR *xdrsp; 535 char *dirp; 536 { 537 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 538 } 539 540 int 541 xdr_fh(xdrsp, np) 542 XDR *xdrsp; 543 struct nfhret *np; 544 { 545 if (!xdr_u_long(xdrsp, &(np->stat))) 546 return (0); 547 if (np->stat) 548 return (1); 549 return (xdr_opaque(xdrsp, (caddr_t)&(np->nfh), NFSX_FH)); 550 } 551 552 __dead void 553 usage() 554 { 555 (void)fprintf(stderr, "usage: mount_nfs %s\n%s\n%s\n%s\n", 556 "[-bcdiKklMPqsT] [-a maxreadahead] [-D deadthresh]", 557 "\t[-g maxgroups] [-L leaseterm] [-m realm] [-o options] [-R retrycnt]", 558 "\t[-r readsize] [-t timeout] [-w writesize] [-x retrans]", 559 "\trhost:path node"); 560 exit(1); 561 } 562
Indexes created Sun Sep 28 16:09:52 GMT 2025